Telephone instrument



FIG. 1 is a perspective front view of a telephone instrument showing my design;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a perspective rear view of FIG. 1; and

FIG. 5 is a bottom plan view of FIG. 1. 

The ornamental design for a telephone instrument, as shown. 